Samuel m



(No Modei.) S. M. BEERY.

SAFETY VALVE.

No. 478,949. Patented July 12, 1892.

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UNITED STATES PATENT OFFICE.

SAMUEL M. BEERY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE BEERY VALVE COMPANY, OF SAME PLACE.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 478,949, dated July 12, 1892.

Application filed April 5, 1892- Serial No. 427,860. (No model.)

To atZZ whom it nasty concern-.-

Be it known that I, SAMUEL M. BEERY, a citizen of the United States, residing at Chis cago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Safety-Valves, of which the following is a specification.

My invention relates to an improvement in the class of automatic valve devices employed :0 for safety or other venting purposes, the valve device involving as its essential construction a shell having an inlet and an outlet, a valvehead, normally seated against the inlet and yieldingly held in that position by a spring,

and a yielding housing for the spring to shield it and the valve-stem against access to either of the fluids (steam or water) which enters the chamber. The object of so shielding the parts is to protect them against corrosion or the accumulation upon them of salt from brine when the latter is the liquid for the control of which the valve is employed, as in the case of hot-water circulation for heating purposes, in which connection it is common for the 2 5 safety-valve to become so obstructed against action by corrosion and frequently by the accumulation upon the regulating-sprin g of salt as to endanger the system.

To illustrate my present improvement, I have selected the form of valve presented in Letters Patent of the United StatesNo. 459,1 32, granted to me on the 8th day of September, 1891, and designed for the same purpose as my present improvement, which, however, 3 5 more effectively than the said patented valve shields the spring and valve-stem.

In the accompanying drawings, Figure 1 shows my improved valve in vertical sectional elevation. Fig. 2 is a view in elevation of the shield, housing the valve-stem and its surrounding spring. Fig. 3 is a similar view of the cap for holding the parts together in the valve-chamber and for affording a tight seat for the upper end of the shield.

A is the valve-chamber, open at one end to admit the retaining-cap B, which is adjustable, and to that end maybe adapted, as shown, to screw into the chamber, the chamber being provided with an inlet 0", represented as an externally threaded hollow nipple, and

with an outlet q, which should be near the base of the chamber. \Vhere the inlet 4 enters the chamber A at its base it forms a seat for a valve-head p, the stem 0 of which extends through the chamber, wherein it is surrounded by a spring n, confined between the valve-head p and cap C, which is preferably hollow, as shown, and through which the stem also passes. I also prefer to provide a lever m, fulcrumed on an arm on, to engage the to valve-stem nearits outer end and afford means for raising the valve 1) by hand for venting purposes.

Inside the chamber A the stem 0 and spring 12 are housed in a telescoping shield B, formed in two sections 1 and t', the former of which extends from the valve p, with which it should be integral or hermetically joined, while the section t' extends from a head i, which is preferably shaped like the valve-head p, but hollow to surround the stem 0 and which seats inside the cap C at its upper or outer portion, being firmly but yieldingly retained in place by the force of the spring, which thus tends to distend the telescoping sections of the housing B and firmly seat the valve and head at its opposite ends.

By the foregoing construction it is physically impossible for any of the fluid or any material portion thereof which enters the chamber A to gain access either into the housing B (the sections Z and 2' of which fit each other closely, with the upper one extending outside the lower one) and thus to the spring and-valve-stem or to escape around the head t" to the stem, owing to the tight closure around it of that head. I find it desirable t0 bevel the lower edge of the housing section 11 down to aknife-edge, as shown at 00 in Fig. 2, as it then, in moving up and down by working the valve 19, the more readily removes any incrustation that may accumulate on the outer surface of the inner, lower section Z.

' hat I claim as new, and desire to secure by Letters Patent, is-

1. In a valve device, the combination, with the valve-chamber having an inlet and an outlet, of a cap for the open end of the chamber, a valve seated over the inlet and having its stein extending through the cap, a spring on the stem,and a shield formed in telescoping sections surrounding the spring and stem in the chamber and confined between the valve and cap, the section which extends from the cap encircling and closely fitting toward its inner end the exterior of the adjacent end of the companion section, and the spring operating to disten d the shield and seat the valve, substantially as described.

2. In a valve device, the combination, with the valve-chamber having an inlet and an outlet, of a cap for the open end of the chamber having a valve-seat in its under side, a valve seated over the inlet and having its stem extending through the cap and valve-seat thereon, a spring on the stem, and a shield formed in telescoping sections surrounding the spring and stem in the chamber, one section extending from the said valve and the other having a head surrounding the stem to engage the said seat in the cap, the spring operating to distend the shield and seat the valve and head at its opposite ends, substantially as described.

In a valve device, the combination, with the valve-chamber having an inlet and an outlet, of an adjustable cap for the open end of the chamber, a valve seated over the inlet and having its stem extending through the cap, a spring on the stem, and a shield formed in telescoping sections surroundingthe spring and stem in the chamber and confined between the valve and cap, the upper section being beveled to form a knife-edge at its lower end, and the spring tending to distend the shield and seat the valve, substantially as described.

4:- In a valve device, the combination, with the valve-chamber having an inlet and an outlet, of an adjustable hollow cap C for the open end of the chamber, having a seat in lts outer side, a valve 1), seated over the inlet and naving its stem extending through the cap and seat therein, a spring a, surrounding the stem in the chamber, and a shield B, formed in telescoping sections Z and i, surrounding the spring and stem in the chamber, the sect on Z extending from the valve 1'), and the sect on '5 being confined in the hollow cap and having a head z" surrounding the stem to engage the seat in the cap, the spring operating to distend the telescoping sections of the shield and seat the valve and head at its opposite ends, substantially as described.

5. A valve device comprising, in combination, a valve-chamber A, having an inlet r and an outlet q, an adjustable hollow cap C for the open end of the chamber, having a seat in its under side, a valve 17, seated over the inlet and having its stem 0 extending through the cap and seat therein, a spring a, surrounding the stem in the chamber, a shield B, formed in telescoping sections Z and i, surrounding the spring and stem in the chamber, the section extending from the valve 1), and the section 1, being confined in the hollow cap and having a bevel 00 on its lower edge and at its upper end a head 1" surrounding the stem to engage the seat in the cap, the spring operating to distend the telescoping sections of the shield and seat the valve and head at its opposite ends, and a lever m, fulcrumed on-the chamber A and engaging at one end the projecting end of the stem, the whole being constructed and arranged to operate substantially as described.

SAMUEL M. BEERY. In presence of M. J. FRosr, J. N. HANSON. 

